/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffect.h
Attempts to recalculate the magnitude given a changed aggregator. This will only recalculate if we are a modifier that is linked (non snapshot) to the given aggregator.
bool AttemptRecalculateMagnitudeFromDependentAggregatorChange ( const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & InRelevantSpec, float & OutCalculatedMagnitude, const [FAggregator](API\Plugins\GameplayAbilities\FAggregator) * ChangedAggregator ) const